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Fri, 28 Oct 2022 06:39:23 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 8FE1D219F7; Fri, 28 Oct 2022 10:39:19 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 2C85013A6E; Fri, 28 Oct 2022 10:39:19 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id yENfCFexW2PVPwAAMHmgww (envelope-from ); Fri, 28 Oct 2022 10:39:19 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1666953559; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hxNN+bHmh99vHxaMD5hTuWnC6gOpUab965bxfRxyBnw=; b=Cof0Z8KRyM/YiZ3Kf63K98qmdkDbJR+X8Gc/IW+z1LIPfJKnw75BvwT+EV+kjc7vqUPLs7 L3BpPjDl0+E5oyifLyCjkfNtwLPhAAzqlK8KJOsAUlk7hCrbGPVy0DvGdU7iaoS1m/EoPO G7OSW0clNqv69M17YgJaqeJSwIff5cM= From: Nikolay Borisov To: dgilbert@redhat.com, berrange@redhat.com Cc: qemu-devel@nongnu.org, jfehlig@suse.com, Claudio.Fontana@suse.com, dfaggioli@suse.com, Nikolay Borisov Subject: [PATCH v3 06/14] io: add and implement QIO_CHANNEL_FEATURE_SEEKABLE for channel file Date: Fri, 28 Oct 2022 13:39:06 +0300 Message-Id: <20221028103914.908728-7-nborisov@suse.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221028103914.908728-1-nborisov@suse.com> References: <20221028103914.908728-1-nborisov@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2001:67c:2178:6::1c; envelope-from=nborisov@suse.com; helo=smtp-out1.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1666953754238100007 Content-Type: text/plain; charset="utf-8" Add a generic QIOChannel feature SEEKABLE which would be used by the qemu_file* apis. For the time being this will be only implemented for file channels. Signed-off-by: Nikolay Borisov --- include/io/channel.h | 1 + io/channel-file.c | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/include/io/channel.h b/include/io/channel.h index 6b10bce8bbdf..b645989e467c 100644 --- a/include/io/channel.h +++ b/include/io/channel.h @@ -41,6 +41,7 @@ enum QIOChannelFeature { QIO_CHANNEL_FEATURE_SHUTDOWN, QIO_CHANNEL_FEATURE_LISTEN, QIO_CHANNEL_FEATURE_WRITE_ZERO_COPY, + QIO_CHANNEL_FEATURE_SEEKABLE, }; =20 =20 diff --git a/io/channel-file.c b/io/channel-file.c index a7a90c12dc2b..e213a0fd7cd2 100644 --- a/io/channel-file.c +++ b/io/channel-file.c @@ -35,6 +35,11 @@ qio_channel_file_new_fd(int fd) =20 ioc->fd =3D fd; =20 + if (lseek(fd, 0, SEEK_CUR) !=3D (off_t)-1) { + qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_SEEK= ABLE); + } + + qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_SEEKABLE= ); trace_qio_channel_file_new_fd(ioc, fd); =20 return ioc; @@ -59,6 +64,10 @@ qio_channel_file_new_path(const char *path, return NULL; } =20 + if (lseek(ioc->fd, 0, SEEK_CUR) !=3D (off_t)-1) { + qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_SEEK= ABLE); + } + trace_qio_channel_file_new_path(ioc, path, flags, mode, ioc->fd); =20 return ioc; --=20 2.34.1